Dr. Gareth Nye warns pillowcases may be dirtier than toilets due to bacteria from sweaty sleep.

Medical expert Dr. Gareth Nye warns pillowcases may be dirtier than toilets due to bacteria from sweaty sleep. Dr. Nye, a program lead for medical science, advises washing pillowcases and bedsheets weekly to prevent germ and bacteria buildup, despite most bacteria likely being harmless and personal. Maintaining cleanliness is crucial to avoid potential health risks.